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Page Title:
Table 4-2. Direct/General Support Troubleshooting - continued |
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  TM
55-1730-229-34
AG
320A0-MME-000
TO
35C2-3-473-2
TM
1730-34/1
Table 4-2.
AGPU DOES NOT DRIVE WHEN SPEED/DIRECTION CONTROL ASSEMBLY HANDGRIPS ROTATED
34.
IN EITHER DIRECTION (CONDITIONS PROPER FOR OPERATION) (continued)
Set power switches off and disconnect battery. Inspect motor brushes.
step 4.
Replace brushes (paragraph 10-10) if required. Perform bench test. If new brushes do not
correct problem, replace motor (paragraph 10-10), and perform operational check.
Bench test traction motor.
Step 4.1.
a.
Remove traction motor (refer to TM 55-1730-229-34, paragraph 10-10).
b.
Clamp traction motor to a bench or install in an appropriate clamping device.
Obtain a battery or other 24-28 vdc power supply.
c.
d.
Connect a jumper wire from S1 to A2. Connect the negative lead from the power
supply to S2. Connect the positive lead from the power supply to A1. Apply 24-
28 vdc. Motor should run clockwise. Remove cables.
Connect a jumper wire from S1 to A1. Connect the negative lead from the power
e.
supply to S2. Connect the positive lead from the power supply to A2. Apply 24-
28 vdc. Motor should run counterclockwise. Remove cables.
f.
If motor does not operate properly, replace the motor.
If the motor operates properly, install motor (refer to TM 55-1730-229-34, para-
g.
graph 10-10). Go to step 4.2.
Step 4.2.
Check voltage adjustment on the motor controller.
NOTE
a.
Insure the AGPU switches and traction motor are set to the alternate propulsion mode
b.
Set the drive switch on and check that the drive lamp is illuminated.
2-20
Change 4
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